Added Alt-X (edit) menu option/key command.
Fixed Zmodem upload/download menu commands.

Changed the menu command from Alt-M to Alt-Z (consistent with popular terminal
programs: Procomm Plus, Telix, mTelnet, etc.).

Added more credits.

still live before disconnecting.  (Was causing closing a spy socket to close
the connection).

structs made up of only the types char, INT16, WORD, INT32, DWORD, structs,
and floats and generates both a header and C source file which will pack
and unpack the structure to/from a buffer in a cross-platform manner.

NOTE: Currently, xpdev only defines the char, WORD, and DWORD types.
INT16 actually conflicts with an existing macro.  (For interrupt 16)

send_zrinit() now sets ZF0 flags based on configurable BOOLs.

Added note regarding rzsz syntax.
Added sexyz.ini "Telnet" and "OutbufSize" values.

Increase default output buffer length from 4K to 8K.
-2 and -4 cmdline options set max (instead of initial) block len.

More log output regarding request of remote CRC.

available.

Added support for [zmodem] InitTimeout and CrcTimeout values.
Shortened error/debug messages.
Fixed (yet another) zmtx-rx bug: do { continue; } while(FALSE); // doesn't
More/improved logging.

If send_byte() WaitForEvent times-out, but there is space in the buffer, don't
return an error.
Use setvbuf() to speed up the CRC calculation of local files.
Added support for [zmodem] InitTimeout and CrcTimeout values.

On send error, wait up to 1 sec for back channel data after next frame.

Include the current Zmodem block size and CRC size in progress display.

Simplified progress callback even more with zm.start_transfer_pos member.
Added consecutive error counter.
Increased default send/recv timeouts from 10 to 15 seconds.